Home / 3,126.20-4,691.12-1,178.55

Finding the Fourth Proportional to 3,126.20, 4,691.12 and 1,178.55

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Solution

The fourth proportional to 3,126.20, 4,691.12 and 1,178.55 is: 1,768.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.20 : 4,691.12 = 1,178.55 : x
  2. Step 2: Convert to fraction form
    3,126.20/4,691.12 = 1,178.55/x
  3. Step 3: Cross multiply
    3,126.20x = 4,691.12 × 1,178.55
  4. Step 4: Simplify right side
    3,126.20x = 5,528,713.58
  5. Step 5: Solve for x
    x = 5,528,713.58/3,126.20
  6. Step 6: Final answer
    x = 1,768.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.